第三人称单数： upgrades
过去式： upgraded
过去分词： upgraded
现在分词： upgrading

提示：点击例句中的单词，就可以看到词义解释

How can you upgrade them to become more productive ?

你如何升级这些技能并变得更有效率？

But the biggest reason to upgrade is probably increased performance .

不过升级的最大理由大概是性能的提升。

Maybe you need to upgrade your skills .

也许，你需要提高自己的技能。

When is it time to upgrade your storage conditions ?

什么时候应该考虑升级你的贮藏条件？

But there are good reasons for xp users to upgrade .

但是也有些很好的理由让xp用户升级。